From 187bd82f1d5366e0a9137c2af5c5f06589552b1c Mon Sep 17 00:00:00 2001
From: Se7enZ <se7enZ@protonmail.com>
Date: Tue, 17 Sep 2024 12:26:46 +0200
Subject: [PATCH] pyln-testing: Fix file descriptor leak in bitcoind fixture.
 ([#7130])

Changelog-Fixed: pyln-testing: Fix file descriptor leak in bitcoind fixture. ([#7130])
---
 contrib/pyln-testing/pyln/testing/fixtures.py | 2 ++
 contrib/pyln-testing/pyln/testing/utils.py    | 8 ++++++++
 2 files changed, 10 insertions(+)

diff --git a/contrib/pyln-testing/pyln/testing/fixtures.py b/contrib/pyln-testing/pyln/testing/fixtures.py
index 13631c1be10d..dede9e88d272 100644
--- a/contrib/pyln-testing/pyln/testing/fixtures.py
+++ b/contrib/pyln-testing/pyln/testing/fixtures.py
@@ -164,6 +164,8 @@ def bitcoind(directory, teardown_checks):
         bitcoind.proc.kill()
     bitcoind.proc.wait()
 
+    bitcoind.cleanup_files()
+
 
 class TeardownErrors(object):
     def __init__(self):
diff --git a/contrib/pyln-testing/pyln/testing/utils.py b/contrib/pyln-testing/pyln/testing/utils.py
index 79e4df0be7a9..061dc652f7e2 100644
--- a/contrib/pyln-testing/pyln/testing/utils.py
+++ b/contrib/pyln-testing/pyln/testing/utils.py
@@ -256,6 +256,14 @@ def kill(self):
         self.proc.kill()
         self.proc.wait()
 
+    def cleanup_files(self):
+        """Ensure files are closed."""
+        for f in ["stdout_write", "stderr_write", "stdout_read", "stderr_read"]:
+            try:
+                getattr(self, f).close()
+            except Exception:
+                pass
+
     def logs_catchup(self):
         """Save the latest stdout / stderr contents; return true if we got anything.
         """